Issue #11673: Fix multiprocessing.[Raw]Array constructor to accept a size of type long. Thanks Robert Kern.

Lib/multiprocessing/sharedctypes.py

@@ -78,7 +78,7 @@ def RawArray(typecode_or_type, size_or_initializer):
     Returns a ctypes array allocated from shared memory
     '''
     type_ = typecode_to_type.get(typecode_or_type, typecode_or_type)
-    if isinstance(size_or_initializer, int):
+    if isinstance(size_or_initializer, (int, long)):
         type_ = type_ * size_or_initializer
         return _new_value(type_)
     else:

Lib/test/test_multiprocessing.py

@@ -917,6 +917,13 @@ class _TestArray(BaseTestCase):
     def test_rawarray(self):
         self.test_array(raw=True)
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
+    def test_array_accepts_long(self):
+        arr = self.Array('i', 10L)
+        self.assertEqual(len(arr), 10)
+        raw_arr = self.RawArray('i', 10L)
+        self.assertEqual(len(raw_arr), 10)
+
     @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_getobj_getlock_obj(self):
         arr1 = self.Array('i', range(10))

Misc/NEWS

@@ -43,6 +43,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #11673: Fix multiprocessing Array and RawArray constructors to accept a
+  size of type 'long', rather than only accepting 'int'.
+
 - Issue #10042: Fixed the total_ordering decorator to handle cross-type
   comparisons that could lead to infinite recursion.